JP7448105B1 - Rainwater utilization system, control device, cleaning method and program - Google Patents

Abstract

In equipment that uses rainwater stored in a storage section to flush toilet bowls, it is possible to suppress the deterioration of the sewage pipes through which wastewater from the toilet bowl flows, and to improve the storage space of rainwater in the storage section and the rainwater stored in the storage section. To provide an efficient rainwater utilization system, control device, cleaning method and program. The rainwater utilization system 1 includes a toilet bowl 31, a wastewater pipe 3, a storage device 60 that stores rainwater, a rainwater supply mechanism 70 that supplies rainwater to the toilet bowl 31 and the wastewater pipe 3, and a control device that controls the rainwater supply mechanism 70. 80, the control device 80 includes a water level information acquisition unit 811 that acquires water level information of the storage device 60, a weather prediction information acquisition unit 812 that acquires weather prediction information for the prediction target period, and water level information and weather prediction. and a rainwater supply control unit 813 that determines whether or not to supply rainwater from the storage device 60 to the wastewater pipe 3 before the prediction target period based on the information and controls the rainwater supply mechanism 70.

Description

The present invention relates to a rainwater utilization system, a control device, a cleaning method, and a program.

Conventionally, systems for storing and utilizing rainwater have been known. For example, Patent Document 1 describes a system that sets a rainwater utilization plan for a predetermined period based on acquired weather information.

JP 2021-116579 Publication

By the way, in equipment that uses rainwater stored in a storage section to flush toilet bowls, the amount of rainwater used for flushing toilet bowls may be reduced to save water. easily adheres to sewage pipes, etc. Due to the influence of this adhered filth, there is a risk that the sewage pipes will be damaged and deteriorated.

The present invention suppresses the deterioration of sewage pipes through which wastewater from the toilet flows, in equipment that uses rainwater stored in a storage part for flushing toilet bowls, and also prevents the rainwater from being stored in the storage space in the storage part and the rainwater stored in the storage part. The purpose of the present invention is to provide a rainwater utilization system, a control device, a cleaning method, and a program that can utilize rainwater more efficiently.

(1) The rainwater utilization system includes a toilet bowl, a sewage pipe through which sewage flows from the toilet bowl, a storage section that stores rainwater, and a rainwater supply that supplies the rainwater stored in the storage section to the toilet bowl and the sewage pipe. and a control device that controls the rainwater supply section, the control device including a water level information acquisition section that acquires water level information indicating the water level of the storage section, and a water level information acquisition section that acquires water level information indicating the water level of the storage section, and a control device that controls the rainwater supply section. a weather prediction information acquisition unit that acquires weather prediction information for a target period; and whether to supply rainwater from the storage unit to the sewage pipe before the prediction target period based on the water level information and the weather prediction information. and a rainwater supply control section that determines whether or not the rainwater is present and controls the rainwater supply section based on the determination result.

(2) In the rainwater utilization system according to (1), the weather prediction information includes a predicted rainfall amount for the prediction target period in the region, and the rainwater supply control unit is configured to adjust the water level indicated by the water level information to a predetermined level. If the water level exceeds the water level threshold and the predicted rainfall exceeds a predetermined rainfall threshold, it is determined that rainwater is to be supplied to the wastewater pipe.

(3) In the rainwater utilization system according to (1) or (2), the rainwater supply control section controls the rainwater supply section to drain water from the storage section based on the water level information and the weather prediction information. Adjust the frequency with which the toilet bowl is flushed with rainwater supplied to the toilet bowl.

(4) The control device includes a toilet bowl, a sewage pipe through which sewage flows from the toilet bowl, a storage section that stores rainwater, and a rainwater supply section that supplies the rainwater stored in the storage section to the toilet bowl and the sewage pipe. A control device for controlling the rainwater supply unit in a rainwater utilization system comprising: a water level information acquisition unit that acquires water level information indicating the water level of the storage unit; and a prediction target in the area where the storage unit is located. a weather prediction information acquisition unit that acquires weather prediction information for a period; and whether to supply rainwater from the storage unit to the sewage pipe before the prediction target period based on the water level information and the weather prediction information. and a rainwater supply control unit that determines the determination result and controls the rainwater supply unit based on the determination result.

(5) The cleaning method includes a toilet bowl, a sewage pipe through which sewage flows from the toilet bowl, a storage part that stores rainwater, and a rainwater supply part that supplies the rainwater stored in the storage part to the toilet bowl and the sewage pipe. A cleaning method for cleaning the sewage pipe in a rainwater utilization system, comprising: a water level information acquisition step of acquiring water level information indicating a water level in the storage section; and a prediction target period in the area where the storage section is located. a weather prediction information acquisition step of acquiring weather prediction information of , and determining whether or not to supply rainwater from the storage section to the sewage pipe before the prediction target period based on the water level information and the weather prediction information. and a rainwater supply control step of determining and controlling the rainwater supply section based on the determination result.

(6) The program includes a toilet bowl, a sewage pipe through which sewage flows from the toilet bowl, a storage section that stores rainwater, and a rainwater supply section that supplies the rainwater stored in the storage section to the toilet bowl and the sewage pipe. A water level information acquisition process for acquiring water level information indicating the water level of the storage unit in a control device that controls the rainwater supply unit in a rainwater utilization system comprising: and a weather forecast period for the area where the storage unit is located. a weather prediction information acquisition process for acquiring prediction information, and determining whether to supply rainwater from the storage section to the sewage pipe before the prediction target period based on the water level information and the weather prediction information. , and a rainwater supply control process for controlling the rainwater supply unit based on the determination result.

According to the present invention, in a facility that uses rainwater stored in a storage section for flushing a toilet bowl, deterioration of the sewage pipe through which sewage from the toilet bowl flows is suppressed, and the rainwater storage space in the storage section and the storage section are Stored rainwater can be used more efficiently.

1 is a schematic diagram showing a rainwater utilization system according to an embodiment of the present invention. 1 is a diagram showing a hardware configuration including a control device that executes rainwater utilization control in a rainwater utilization system according to an embodiment of the present invention, and a functional configuration of the control device. It is a flowchart which shows an example of rainwater utilization control performed by the control device of the rainwater utilization system concerning one embodiment of the present invention. It is a flow chart showing an example of rainwater utilization control executed by the control device of the rainwater utilization system according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments.

A rainwater utilization system 1 according to the present embodiment will be described with reference to FIG. 1. FIG. 1 is a schematic diagram showing a rainwater utilization system 1. As shown in FIG.

The rainwater utilization system 1 is a system for utilizing rainwater for flushing flush toilet bowls 31 provided in facilities such as buildings 2 and outdoor toilets. In this embodiment, a rainwater utilization system 1 for washing a toilet bowl 31 provided in a building 2 will be described as an example.

First, the building 2 to which the rainwater utilization system 1 is applied will be explained. As shown in FIG. 1, the building 2 is provided with a bathroom 20, a washroom 40, a toilet 30, and a kitchen 50 inside. Further, within the premises of the building 2, a sewage pipe 3 and a sewage basin 4 are provided below the ground G.

The sewage pipe 3 is a pipe that passes under the building 2 from the ground G outside the building 2 and is connected to a sewage main pipe 5 outside the premises of the building 2. In the sewage pipe 3, sewage and the like from the toilet 30 and the like flows.

The sewage basin 4 is provided on the ground G outside the building 2, and is a basin for inspecting the sewage pipes 3 and the like. The sewage basin 4 is connected to the sewage pipe 3 via a branch pipe 35. A first rainwater supply line 73 of a rainwater supply mechanism 70, which will be described later, is arranged in the sewage basin 4.

The bathroom 20 is provided with a bathtub 21 and a drain port 22 for discharging water in the bathroom 20. The drain port 22 is connected to the sewage pipe 3 via a bathroom drain pipe 23. Water in the bathroom 20 flows through the drain port 22 and the bathroom drain pipe 23 and is discharged into the waste water pipe 3.

The washroom 40 is provided with a washstand 41 having a drain port 42 at the bottom. The drain port 42 is connected to the waste water pipe 3 via a sink drain pipe 43. Water flowing from the washstand 41 flows through a drain port 42 and a washstand drain pipe 43, and is discharged into the waste water pipe 3.

The kitchen 50 is provided with a sink 51 and the like having a drain port 52 at the bottom. The drain port 52 is connected to the wastewater pipe 3 via a sink drain pipe 53. Water flowing from the sink 51 flows through a drain port 52 and a sink drain pipe 53, and is discharged into the waste water pipe 3.

The toilet 30 is provided with a flush toilet bowl 31 that flushes waste with water. The toilet bowl 31 includes a toilet bowl body 32 and an automatic cleaning mechanism 33 that supplies rainwater as flushing water to the toilet bowl body 32.

The toilet main body 32 is supplied with wash water and discharges waste into the toilet drain pipe 34. The toilet drain pipe 34 has one end connected to the toilet main body 32 and the other end connected to the sewage pipe 3. The filth in the toilet main body 32 is discharged to the waste water pipe 3 via the toilet drain pipe 34 by the flush water.

The toilet bowl drain pipe 34 is connected to the sewage pipe 3 on the downstream side (the main sewage pipe 5 side) of the bathroom drain pipe 23 and the sink drain pipe 43 in the sewage pipe 3 . Due to this positional relationship, waste water from the bathroom 20 or the washroom 40 can be sent to the waste water pipe 3 through which the waste water from the toilet bowl 31 has flowed.

The automatic cleaning mechanism 33 is connected to a second rainwater supply line of a rainwater supply mechanism 70, which will be described later. The automatic cleaning mechanism 33 automatically cleans the toilet main body 32 with rainwater supplied from the second rainwater supply line at predetermined time intervals based on a control signal from the control device 80, and also drains the rainwater into the toilet drainage pipe 34. Thereby, the growth of bacteria within the toilet main body 32 and the toilet drain pipe 34 can be prevented. Note that the automatic cleaning mechanism 33 is also a part of the rainwater supply mechanism 70.

Next, the rainwater utilization system 1 will be explained with reference to FIGS. 1 and 2. FIG. 2 is a diagram showing a hardware configuration including a control device 80 that executes rainwater utilization control in the rainwater utilization system 1 and a functional configuration of the control device 80.

The rainwater utilization system 1 includes a toilet bowl 31 and sewage piping 3 of the building 2, a storage device (storage section) 60, a rainwater supply mechanism (rainwater supply section) 70, and a control device 80.

The storage device 60 is a device that is installed outdoors and can collect and store rainwater. The storage device 60 includes a filter tank 61 and a rainwater storage tank 62.

The filter tank 61 is a tank that collects rainwater flowing in from an inflow pipe 63 provided on its side wall, and filters it. Rainwater filtered in the filter tank 61 is sent to a rainwater storage tank 62.

The rainwater storage tank 62 is a tank that stores filtered rainwater. A water level sensor 65 (not shown in FIG. 1) is arranged in the rainwater storage tank 62 to detect the water level. The rainwater storage tank 62 also has an overflow pipe 64 provided on its side wall. When the water level in the rainwater storage tank 62 exceeds a predetermined water level, rainwater is discharged to the outside via the overflow pipe 64.

The rainwater supply mechanism 70 supplies rainwater stored in the rainwater storage tank 62 to the sewage pipe 3 and the toilet bowl 31. The rainwater supply mechanism 70 includes a first rainwater supply mechanism 71 and a second rainwater supply mechanism 72.

The first rainwater supply mechanism 71 supplies rainwater stored in the rainwater storage tank 62 to the wastewater pipe 3. The first rainwater supply mechanism 71 includes a first rainwater supply line 73, a first pump 711 (not shown in FIG. 1), and a first electromagnetic valve 712.

The first rainwater supply line 73 has one end disposed within the rainwater storage tank 62 and the other end disposed within the sewage pipe 3 via the sewage basin 4 . A suction port 74 is provided at one end of the first rainwater supply line 73, which is located near the bottom of the rainwater storage tank 62 and is capable of sucking rainwater in the rainwater storage tank 62. At the other end of the first rainwater supply line 73, a washing nozzle 75 capable of discharging high-pressure water is provided.

The first pump 711 is a device that is disposed on the first rainwater supply line 73 and pumps up rainwater in the rainwater storage tank 62. The first pump 711 pumps up rainwater from the suction port 74 and supplies it to the washing nozzle 75 via the first rainwater supply line 73 . Driving of the first pump 711 is controlled by the control device 80.

The first electromagnetic valve 712 is configured with a valve whose opening degree can be adjusted, and adjusts the flow rate of rainwater flowing through the first rainwater supply line 73. The first electromagnetic valve 712 is arranged near the sewage basin 4 in the first rainwater supply line 73. When the first solenoid valve 712 is opened while the rainwater in the rainwater storage tank 62 is being pumped up by the first pump 711, the rainwater flows through the first rainwater supply line 73 and is supplied from the flushing nozzle 75 to the sewage pipe 3. Ru.

The second rainwater supply mechanism 72 supplies rainwater stored in the rainwater storage tank 62 to the toilet bowl 31. The second rainwater supply mechanism 72 includes a second rainwater supply line (not shown), a second pump 721 (not shown in FIG. 1), a second electromagnetic valve 722 (not shown in FIG. 1), and an automatic cleaning mechanism 33. and.

One end of the second rainwater supply line is disposed within the rainwater storage tank 62, and the other end is connected to the automatic cleaning mechanism 33. A suction port (not shown) located near the bottom of the rainwater storage tank 62 and capable of sucking rainwater in the rainwater storage tank 62 is provided at one end of the second rainwater supply line.

The second pump 721 is a device that is disposed on the second rainwater supply line and pumps up rainwater in the rainwater storage tank 62. The second pump 721 pumps up rainwater from the suction port of the second rainwater supply line and supplies it to the other end of the second rainwater supply line. Driving of the second pump 721 is controlled by the control device 80.

The second electromagnetic valve 722 is constituted by a valve whose opening degree can be adjusted, and is disposed in the second rainwater supply line. The second solenoid valve 722 adjusts the flow rate of rainwater flowing through the second rainwater supply line. When the second solenoid valve 722 is opened while the rainwater in the rainwater storage tank 62 is being pumped up by the second pump 721, the rainwater flows through the second rainwater supply line and is supplied to the automatic flushing mechanism 33 of the toilet bowl 31. .

The control device 80 controls the rainwater supply mechanism 70 to supply the rainwater stored in the storage device 60 to the building 2 based on the information detected by the water level sensor 65 and the information acquired from outside through communication. Execute. Details of the control by the control device 100 will be described later.

Here, in equipment that uses rainwater stored in the storage device 60 etc. to flush the toilet bowl 31, the larger the rainwater storage tank 62 etc. of the storage device 60, the more space can be secured for storing rainwater, which is effective during dry periods etc. It is. However, the space for arranging the storage device 60 is limited, and the size of the storage device 60 may not be able to be increased in some cases. In this case, there is a method to save water by reducing the amount of rainwater used for flushing the toilet, but less water flows from the toilet bowl 31 to the sewage pipe 3, making it easier for filth to adhere to the sewage pipe 3 and the like. Due to the influence of this attached filth, there is a risk that the sewage pipe 3 will be damaged and deteriorated. According to the rainwater utilization control of the rainwater utilization system 1 of this embodiment, the deterioration of the wastewater pipe 3 can be suppressed, and the storage space of the storage device 60 and the rainwater stored in the storage device 60 can be used more efficiently.

Next, the hardware configuration of the control device 80 that performs rainwater utilization control will be described. As shown in FIG. 2, the control device 80 includes a communication section 82, an input section 83, a storage section 84, and a processing section 81.

The communication unit 82 controls communication with the rainwater supply mechanism 70, the water level sensor 65, other equipment provided in the building 2, and external devices. For example, the communication unit 82 receives a detection signal from the water level sensor 65 and transmits a control signal to the rainwater supply mechanism 70. The communication unit 82 also receives information from an external device through communication via a network such as the Internet.

The input unit 83 includes, for example, various buttons such as a touch panel and keys, and input devices such as a microphone, and receives user operations.

The storage unit 84 is a storage area for various programs and various data for making the hardware group function as the control device 80, and is a storage area such as ROM, RAM, flash memory, semiconductor drive (SSD), or hardware (HDD). Can be configured. Specifically, the storage unit 84 stores therein a program for causing the processing unit 81 to execute each function of the present embodiment, a control program for rainwater utilization control, and reference values such as a water level threshold and a rainfall threshold, which will be described later. Note that these reference values can be set by the user as appropriate.

The processing unit 81 is an arithmetic device constituted by a processor, and reads various programs and data from the storage unit 84 and executes predetermined data processing. Processors include, for example, CPU (central processing unit), MPU (micro processing unit), SoC (system on a chip), DSP (digital signal processor), GPU (graphics processing unit), VPU (vision processing unit), and ASIC ( application specific integrated circuit), PLD (programmable logic device), or FPGA (field-programmable gate array).

As shown in FIG. 2, the processing unit 81 includes a water level information acquisition unit 811, a weather prediction information acquisition unit 812, and a rainwater supply control unit 813.

The water level information acquisition unit 811 executes a process of acquiring water level information indicating the water level of the storage device 60. The water level information acquisition unit 811 of this embodiment acquires the water level of the rainwater storage tank 62 detected by the water level sensor 65 as water level information via the communication unit 82.

The weather prediction information acquisition unit 812 executes processing to acquire weather prediction information for the prediction period in the area where the storage device 60 is located. The weather prediction information acquisition unit 812 may acquire weather prediction information from an external device that has weather prediction information, for example, through communication via the Internet, etc., and acquires information input by the user through the input unit 83 as weather prediction information. Good too. The weather forecast information may be, for example, values announced by a weather observatory such as the Japan Meteorological Agency.

Weather prediction information for a prediction target period means weather information for a certain period in the future, for example, it may be weather information for one hour half a day from the current time, or it may be weather information for one day the next day. Good too. Further, the type of weather prediction information may be information indicating the type of weather such as clear sky, rainy weather, cloudy sky, heavy rain warning, etc., or may be information including specific numerical values such as predicted rainfall. The weather prediction information acquired by the weather prediction information acquisition unit 812 of this embodiment includes the predicted rainfall amount (hereinafter referred to as predicted rainfall amount R) for the prediction target period in the area where the storage device 60 is placed.

The rainwater supply control unit 813 stores rainwater in the storage device 60 based on the water level information acquired by the water level information acquisition unit 811 (hereinafter referred to as water level W) and the weather prediction information acquired by the weather prediction information acquisition unit 812. Rainwater usage control is executed to control the supply of rainwater to the building 2. The rainwater supply control section 813 includes a first rainwater supply control section 814 and a second rainwater supply control section 815.

The first rainwater supply control unit 814 determines whether or not to supply rainwater from the storage device 60 to the sewage pipe 3 before the prediction target period based on the water level W of the storage device 60 and the weather prediction information, The first rainwater supply mechanism 71 is controlled based on the determination result.

For example, when the water level W exceeds the water level threshold and the weather prediction information for the prediction period indicates rainy weather, the rainwater supply control unit 813 determines that rainwater is to be supplied to the wastewater pipe 3 before the prediction period. Good too. For example, when the water level W exceeds a predetermined water level threshold (hereinafter referred to as the first water level threshold) and the predicted rainfall R exceeds the predetermined rainfall threshold, the first rainwater supply control unit 814 It may be determined that rainwater is to be supplied to the wastewater pipe 3 beforehand. The first water level threshold is not particularly limited, and may be, for example, a water level indicating the rainwater storage capacity of the rainwater storage tank 62, a water level indicating half of the rainwater storage capacity, or a water level indicating 80% of the rainwater storage capacity. It may be a water level that indicates a capacity of 100% or a water level that indicates a capacity of 90%. The rainfall threshold is not particularly limited, and may be, for example, a rainfall of 50 mm per day, a rainfall of less than 50 mm, or a rainfall of more than 50 mm.

When determining that rainwater is to be supplied from the storage device 60 to the sewage pipe 3 before the prediction target period, the first rainwater supply control unit 814 controls the first rainwater supply mechanism 71 before the prediction target period arrives. Rainwater is supplied from the rainwater storage tank 62 to the wastewater pipe 3 via the first rainwater supply line 73. At this time, the first rainwater supply control unit 814 controls to drive the first pump 711 and adjust the opening degree of the first solenoid valve 712 toward the sewage main pipe 5 from the flushing nozzle 75 (arrow in FIG. 1). Direction F) Supply rainwater to the wastewater pipe 3 at a predetermined flow rate and water pressure. As a result, the sewage pipe 3 can be cleaned by the rainwater stored in the rainwater storage tank 62 so as to remove the filth adhering to the sewage pipe 3. Preferably, the predetermined flow rate and the predetermined water pressure are such values that the filth adhering to the sewage pipe 3 can be removed. For example, the predetermined flow rate may be a flow rate of 500 L/hour or more, and the predetermined water pressure may be a water pressure of 10 MPa or more.

Note that the timing at which the first rainwater supply control unit 814 starts supplying rainwater from the rainwater storage tank 62 to the wastewater pipe 3 is not particularly limited. For example, it may be one hour, half a day, or one day before the prediction target period arrives. In addition, the first rainwater supply control unit 814 controls the sewage pipe 3 from when it starts supplying rainwater to the sewage pipe 3 until the water level of the rainwater storage tank 62 becomes less than a predetermined water level threshold (hereinafter referred to as a second water level threshold). Rainwater supply may be repeated. The second water level threshold is not particularly limited as long as it is less than the first water level threshold, and may be, for example, a water level that represents half the rainwater storage capacity of the rainwater storage tank 62, or a water level that represents 20% of the rainwater storage capacity. The water level may be 10% or the water level may be 10% of the capacity.

The second rainwater supply control unit 815 controls the second rainwater supply mechanism to supply rainwater from the storage device 60 to the toilet bowl 31 based on the water level W of the storage device 60 and the weather prediction information, and uses the supplied rainwater to fill the toilet bowl. Adjust the frequency of cleaning 31. In the present embodiment, the second rainwater supply control unit 815 controls the driving of the second pump 721 and the automatic cleaning mechanism 33 and the opening degree of the second electromagnetic valve 722, so that the toilet bowl 31 can be cleaned less frequently during the first cleaning. mode and a second cleaning mode in which the toilet bowl 31 is cleaned more frequently to adjust the frequency of cleaning the toilet bowl 31.

For example, the second rainwater supply control unit 815 may switch to the second cleaning mode when the water level W exceeds the first water level threshold. On the other hand, when the water level W is below the first water level threshold, the second rainwater supply control unit 815 switches to the first washing mode if the predicted rainfall R indicated by the weather prediction information is below the rainfall threshold; If the amount of rainfall exceeds the threshold, the second cleaning mode may be switched to.

Next, an example of rainwater utilization control executed by the processing unit 81 of the control device 80 will be described with reference to FIGS. 3 and 4. 3 and 4 are flowcharts showing an example of rainwater utilization control executed by the control device 80 of the rainwater utilization system 1.

As shown in FIG. 3, in step S11, the water level information acquisition unit 811 acquires the water level of the rainwater storage tank 62 detected by the water level sensor 65 as water level information.

In step S12, the weather prediction information acquisition unit 812 acquires weather prediction information including the predicted rainfall amount R for the prediction target period in the area where the storage device 60 is placed via the communication unit 82.

In step S13, the first rainwater supply control unit 814 determines whether the water level W acquired in step S11 exceeds the first water level threshold. When the first rainwater supply control unit 814 determines that the water level W is less than the first water level threshold (NO in step S13), the process proceeds to step S14. On the other hand, when the first rainwater supply control unit 814 determines that the water level W exceeds the first water level threshold (YES in step S13), the process proceeds to step S21. The process of step S21 will be described later.

In step S14, the second rainwater supply control unit 815 determines whether the predicted rainfall R obtained in step S12 exceeds the rainfall threshold. When the second rainwater supply control unit 815 determines that the predicted rainfall R is less than or equal to the rainfall threshold (NO in step S14), the process proceeds to step S15. Then, the second rainwater supply control unit 815 switches the frequency of cleaning the toilet bowl 31 performed by the automatic cleaning mechanism 33 to the first cleaning mode, which has a lower frequency, and then ends the rainwater utilization control. On the other hand, when the second rainwater supply control unit 815 determines that the predicted rainfall R exceeds the rainfall threshold (YES in step S14), the process proceeds to step S16.

In step S16, the second rainwater supply control unit 815 switches the frequency of cleaning of the toilet bowl 31 performed by the automatic cleaning mechanism 33 to a second cleaning mode with a higher frequency.

In step S17, the processing unit 81 determines whether a predetermined time has elapsed since the event in step S16 occurred, and if the predetermined time has elapsed, the process proceeds to step S18.

In step S18, the water level information acquisition unit 811 acquires the water level of the rainwater storage tank 62 detected by the water level sensor 65 as water level information.

In step S19, it is determined whether the water level W acquired in step S18 exceeds the first water level threshold. When determining that the water level W exceeds the first water level threshold (YES in step S19), the first rainwater supply control unit 814 moves the process to step S20, and determines that the water level W is below the first water level threshold. (NO in step S19), the process moves to step S21.

In step S20, the first rainwater supply control unit 814 controls the first rainwater supply mechanism 71 to drain the rainwater from the rainwater storage tank 62 to the sewage pipe 3 before the prediction target period for the predicted rainfall R acquired in step S12 arrives. Provide rainwater. After that, the processing unit 81 ends the rainwater utilization control.

In step S21, the rainwater supply control unit 813 determines whether the prediction target period has elapsed. When the rainwater supply control unit 813 determines that the prediction target period has not elapsed (NO in step S21), the rainwater supply control unit 813 resets the total elapsed time from the occurrence of the event in step S16 to "0", and then performs the process. Return to step S17. On the other hand, when the rainwater supply control unit 813 determines that the prediction target period has passed (YES in step S21), the process proceeds to step S22.

In step S22, the second rainwater supply control unit 815 switches the frequency of cleaning the toilet bowl 31 performed by the automatic cleaning mechanism 33 to a first cleaning mode with a lower frequency. After that, the processing unit 81 ends the rainwater utilization control.

As shown in FIG. 4, in step S23, the second rainwater supply control unit 815 switches the frequency of cleaning of the toilet bowl 31 performed by the automatic cleaning mechanism 33 to a second cleaning mode with a higher frequency.

In step S24, the first rainwater supply control unit 814 determines whether the predicted rainfall R acquired in step S12 exceeds the rainfall threshold. When the first rainwater supply control unit 814 determines that the predicted rainfall R is less than or equal to the rainfall threshold (NO in step S24), the first rainwater supply control unit 814 ends the rainwater utilization control. On the other hand, when the first rainwater supply control unit 814 determines that the predicted rainfall R exceeds the rainfall threshold (YES in step S24), the process proceeds to step S25.

In step S25, the first rainwater supply control unit 814 controls the first rainwater supply mechanism 71 to drain the rainwater from the rainwater storage tank 62 to the sewage pipe 3 before the prediction target period for the predicted rainfall R acquired in step S12 arrives. Provide rainwater. After that, the processing unit 81 ends the rainwater utilization control. Note that the processing unit 81 repeats the rainwater utilization control shown in FIGS. 3 and 4 at predetermined intervals.

According to the embodiment described above, the following effects are achieved.

The rainwater utilization system 1 according to the present embodiment includes a toilet bowl 31, a sewage pipe 3 through which sewage from the toilet bowl 31 flows, a storage device 60 that stores rainwater, and a storage device 60 that stores rainwater through the toilet bowl 31 and the sewage pipe. 3, a control device 80 that controls the rainwater supply mechanism 70, and a water level information acquisition unit 811 that obtains water level information indicating the water level of the storage device 60; A weather prediction information acquisition unit 812 that acquires weather prediction information for the prediction period in the area where the device 60 is located, and a weather prediction information acquisition unit 812 that transfers rainwater from the storage device 60 to the wastewater pipe 3 from the prediction period based on the water level information and the weather prediction information. and a rainwater supply control unit 813 that determines whether water is to be supplied in advance and controls the rainwater supply mechanism 70 based on the determination result.

Here, in a facility that uses rainwater stored in the storage device 60 to flush the toilet bowl 31, when saving water by reducing the amount of rainwater used for flushing the toilet bowl 31, less water flows from the toilet bowl 31 to the sewage pipe 3. This makes it easier for filth to adhere to the sewage pipes 3 and the like. If the filth attached to the sewage pipe 3 is left unattended, there is a risk that the sewage pipe 3 will deteriorate.

In the rainwater utilization system 1 of this embodiment, based on the water level of the storage device 60 and the weather prediction information for the prediction period, whether or not to supply rainwater from the storage device 60 to the sewage pipe 3 before the prediction period arrives? is determined, and processing is performed based on the determination result. For example, when the water level in the storage device 60 is high and rain is predicted, the rainwater stored in the storage device 60 can be flowed into the wastewater pipe 3 in advance before it rains. Thereby, the sewage pipe 3 can be washed with rainwater to remove filth adhering to the sewage pipe 3, and deterioration of the sewage pipe 3 can be suppressed. Furthermore, the water level of the storage device 60 can be lowered before it rains to enhance the flood control function of the storage device 60, contributing to flood prevention in the case of heavy rain. Therefore, deterioration of the wastewater pipe 3 can be suppressed, and the rainwater storage space in the storage device 60 and the rainwater stored in the storage device 60 can be used more efficiently.

Furthermore, in the rainwater utilization system 1 according to the present embodiment, the weather prediction information includes the predicted rainfall amount for the prediction target period in the region, and the rainwater supply control unit 813 determines that the water level indicated by the water level information is below a predetermined first water level threshold. and when the predicted rainfall exceeds a predetermined rainfall threshold, it is determined that rainwater is to be supplied to the wastewater pipe 3.

Thereby, when the water level of the storage device 60 exceeds the predetermined first water level threshold and the predicted rainfall exceeds the predetermined rainfall threshold, the wastewater pipe 3 can be washed with the rainwater stored in the storage device 60 in advance. , the flood control function of the storage device 60 can be enhanced.

Furthermore, in the rainwater utilization system 1 according to the present embodiment, the rainwater supply control unit 813 controls the rainwater supply mechanism 70 based on the water level information and the weather prediction information, so that the rainwater supplied from the storage device 60 to the toilet bowl 31 is Adjust the frequency of cleaning the toilet bowl 31.

Thereby, rainwater can be used more efficiently by considering the current water level of the storage device 60 and the water level predicted based on weather forecast information.

The control device 80 according to the present embodiment includes a toilet 31, a sewage pipe 3 through which sewage from the toilet 31 flows, a storage device 60 that stores rainwater, and a storage device 60 that stores rainwater from the toilet 31 and the sewage pipe 3. A control device 80 that controls the rainwater supply mechanism 70 in the rainwater utilization system 1 comprising: a rainwater supply mechanism 70 that supplies water to the storage device 60; A weather prediction information acquisition unit 812 that acquires weather prediction information for the prediction period in the area where the device 60 is located, and a weather prediction information acquisition unit 812 that transfers rainwater from the storage device 60 to the wastewater pipe 3 from the prediction period based on the water level information and the weather prediction information. and a rainwater supply control unit 813 that determines whether water is to be supplied in advance and controls the rainwater supply mechanism 70 based on the determination result.

The cleaning method according to the present embodiment includes a toilet bowl 31, a sewage pipe 3 through which sewage flows from the toilet bowl 31, a storage device 60 that stores rainwater, and a storage device 60 that stores rainwater into the toilet bowl 31 and the sewage pipe 3. A cleaning method for cleaning sewage pipes 3 in a rainwater utilization system 1 comprising: a rainwater supply mechanism 70 for supplying rainwater; a weather prediction information acquisition step of acquiring weather prediction information for the prediction period in the area to be predicted; and supplying rainwater from the storage device 60 to the wastewater pipe 3 before the prediction period based on the water level information and the weather prediction information. a rainwater supply control step of determining whether or not the rainwater supply mechanism 70 is controlled based on the determination result.

The program according to the present embodiment includes a toilet 31, a sewage pipe 3 through which sewage flows from the toilet 31, a storage device 60 that stores rainwater, and a storage device 60 that supplies rainwater stored in the storage device 60 to the toilet 31 and the sewage pipe 3. A water level information acquisition process for acquiring water level information indicating the water level of the storage device 60 and a storage device 60 are arranged in a control device 80 that controls the rainwater supply mechanism 70 in the rainwater utilization system 1 that includes a rainwater supply mechanism 70 . A weather prediction information acquisition process that acquires weather prediction information for a prediction period in a region, and whether rainwater is supplied from the storage device 60 to the wastewater pipe 3 before the prediction period based on the water level information and the weather prediction information. A rainwater supply control process for controlling the rainwater supply mechanism 70 based on the determination result is executed.

Although one embodiment of the present invention has been described above, the present invention is not limited to this. The detailed structure may be changed as appropriate within the scope of the spirit of the present invention.

In the embodiment described above, the toilet bowl drain pipe 34 was connected to the sewage pipe 3 on the downstream side of the bathroom drain pipe 23 and the washstand drain pipe 43 in the sewage pipe 3, but the bathroom drain pipe 23 and the washstand drain pipe 43 It may be connected to the wastewater pipe 3 on the upstream side.

In the above embodiment, the rainwater supply control section 813 has a configuration including a first rainwater supply control section 814 and a second rainwater supply control section 815, but it may also have a configuration without the second rainwater supply control section 815. good. That is, the rainwater utilization system 1 may have a configuration in which the frequency of flushing the toilet bowl with rainwater supplied from the storage device 60 to the toilet bowl 31 is not adjusted based on the water level information and weather prediction information.

1 Rainwater Utilization System 3 Sewage Piping 21 Toilet Bowl 60 Storage Device 70 Rainwater Supply Mechanism (Rainwater Supply Unit)
80 Control device 811 Water level information acquisition unit 812 Weather prediction information acquisition unit 813 Rainwater supply control unit

Claims (6)

toilet bowl and
A sewage pipe through which sewage from the toilet flows;
A storage section that stores rainwater;
a rainwater supply unit that supplies rainwater stored in the storage unit to the toilet bowl and the sewage pipe;
A control device that controls the rainwater supply section,
The control device includes:
a water level information acquisition unit that acquires water level information indicating the water level of the storage unit;
a weather prediction information acquisition unit that acquires weather prediction information for a prediction period in the area where the storage unit is located;
Based on the water level information and the weather prediction information, it is determined whether or not rainwater is to be supplied from the storage section to the sewage pipe before the prediction target period, and the rainwater supply section is activated based on the determination result. A rainwater utilization system comprising: a rainwater supply control unit for controlling the rainwater; The weather forecast information includes predicted rainfall for the forecast period in the region,
Claim 1: The rainwater supply control unit determines to supply rainwater to the sewage pipe when the water level indicated by the water level information exceeds a predetermined water level threshold and the predicted rainfall exceeds a predetermined rainfall threshold. Rainwater utilization system described in . The rainwater supply control section controls the rainwater supply section based on the water level information and the weather prediction information to adjust the frequency of cleaning the toilet bowl with rainwater supplied from the storage section to the toilet bowl. Rainwater utilization system according to item 1 or 2. A rainwater utilization system comprising a toilet bowl, a sewage pipe through which sewage flows from the toilet bowl, a storage section that stores rainwater, and a rainwater supply section that supplies the rainwater stored in the storage section to the toilet bowl and the sewage pipe. A control device for controlling the rainwater supply section in
a water level information acquisition unit that acquires water level information indicating the water level of the storage unit;
a weather forecast information acquisition unit that acquires weather forecast information for a forecast period in the region where the storage unit is located;
Determining whether or not to supply rainwater from the storage section to the sewage pipe before the prediction target period based on the water level information and the weather prediction information, and controlling the rainwater supply section based on the determination result. A control device comprising: a rainwater supply control section for controlling; A rainwater utilization system comprising a toilet bowl, a sewage pipe through which sewage flows from the toilet bowl, a storage section that stores rainwater, and a rainwater supply section that supplies the rainwater stored in the storage section to the toilet bowl and the sewage pipe. A cleaning method for cleaning the sewage pipe, comprising:
a water level information acquisition step of acquiring water level information indicating the water level of the storage section;
a weather forecast information acquisition step of acquiring weather forecast information for a forecast period in the region where the storage unit is located;
Determining whether or not to supply rainwater from the storage section to the sewage pipe before the prediction target period based on the water level information and the weather prediction information, and controlling the rainwater supply section based on the determination result. a cleaning method comprising: a rainwater supply control step; A rainwater utilization system comprising a toilet bowl, a sewage pipe through which sewage flows from the toilet bowl, a storage section that stores rainwater, and a rainwater supply section that supplies the rainwater stored in the storage section to the toilet bowl and the sewage pipe. A control device for controlling the rainwater supply section,
a water level information acquisition process that acquires water level information indicating the water level of the storage section;
Weather prediction information acquisition processing for acquiring weather prediction information for a prediction target period in the area where the storage unit is located;
Determining whether or not to supply rainwater from the storage section to the sewage pipe before the prediction target period based on the water level information and the weather prediction information, and controlling the rainwater supply section based on the determination result. Rainwater supply control processing to control, and a program to execute.

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